NGWS SDK Documentation  

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Compiler Error C2196

case value 'value' already used

A switch statement uses the same case value more than once.

The following sample generates C2196:

void f()
{
    int i;
    switch( i )
    {
    case 0:
        break;
    case 0:    // error, case value '0' already used
        break;
    }
}